he core gameplay remains unchanged from the other games in the series.[1] The Guitar Grip is required to play the game and comes as part of a bundle that can be purchased for each instalment. The Guitar Grip is designed for the Nintendo DS Lite, but the bundles also include a small GBA extended adapter that can be used for the original Nintendo DS model.[2] Four fret buttons are located on the side of the unit near the cartridge slot. This is one less than the normal five frets, included an orange-coloured one, managed by other Guitar Hero controllers. A wrist-strap is attached to the underside to provide support while playing. The player holds the unit in a vertical book orientation (similar to Ninja Gaiden: Dragon Sword or Hotel Dusk: Room 215), and uses a special guitar pick-shaped stylus to strum on the touchscreen of the DS with his or her free hand. The "note highway" and the performance of the chosen character in the band are shown on the opposite screen.[1] As notes scroll down on the note highway, the player must press the correct fret button and strum the touchscreen at the same time to successfully score points.